Health Level Seven (HL7) International, the global authority on standards for interoperability of health information technology with members in 55 countries has announced that the highly anticipated greenCDA Implementation Guide is scheduled to be released in March. The HL7 Clinical Document Architecture (CDA) is at the core of the requirement for Meaningful Use of Electronic Health Records. It supports continuity of care and re-use of clinical data for public health reporting, quality monitoring, patient safety and clinical trials. greenCDA maintains the full utility of CDA while making it easier to implement. It is a simplified XML for CDA templates. HL7 is a non-profit, ANSI accredited standards development organisation dedicated to providing a comprehensive framework and related standards for the exchange and uation of health services. “Any developer with basic XML knowledge and a tool that can process simple XML schemas can create green instances. We flattened the hierarchy, focused on variable data verses fixed structural markup, and removed complexities like xsi: type. The result is simple and intuitive,” said Rick Geimer, Lantana Group CTO and co-editor of the greenCDA Implementation Guide. The CDC is planning a pilot project with vendors interested in usinggreenCDA to enable use of their systems for submitting Central Line Insertion Practices (CLIP) data to the National Healthcare Safety Network (NHSN). HL7 invites the world to “go green” and looks forward to a robust and informative discussion with all stakeholders leading to acceleration of the development and adoption of interoperable clinical information systems.